Frequent urination, severe thirst without any causes, unexplained loss of weight and increased hunger are symptoms of diabetes. Diabetes is a situation in which blood sugar levels are too high. Type-2 diabetes involves cases in which the body does not use the insulin well, and hence the glucose remains in the blood. Hence, your doctor might ask you to take a blood glucose test in which the amount of glucose in the blood is measures to determine if you have diabetes or not.